JP3355447B2 - Reinforcement method and reinforcement girder for traveling girder of overhead traveling crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reinforcing a traveling girder of an overhead traveling crane and a reinforcing girder. Specifically, if it becomes necessary to strengthen the girder as the lifting capacity of the overhead traveling crane increases, it is necessary to remove the existing girder and install a new girder that meets the specified design strength separately. Rather, the present invention relates to a method of reinforcing a traveling girder and a reinforcing girder of a traveling girder of an overhead traveling crane which can minimize the range of reinforcement and remodeling without removing an existing main structure, shorten the construction period, reduce cost, and save labor.

[0002]

2. Description of the Related Art In order to increase the strength of a traveling girder of an overhead traveling crane that has been already installed,
(1) There is a method of removing an existing traveling girder and newly installing a traveling girder having a higher strength. (2) As another method, a steel cover plate is attached to the upper flange or the lower flange of the traveling beam of the traveling girder, and the cross-sectional performance of the traveling girder is improved by utilizing the existing traveling girder. (3) Further, as another method, a steel T-shaped member is attached to the upper flange or the lower flange of the traveling beam of the traveling girder,
Utilize the existing running girder to improve the cross-sectional performance of the running girder. A case where a steel T-shaped member is attached to the lower flange of the traveling beam of the traveling girder to reinforce the traveling girder will be described with reference to FIGS. When the existing traveling girder (marked with A) provided above the pillar 14 of the existing building in FIG. 3 is shown in an enlarged manner in FIG. 4, the traveling girder is composed of the traveling beam 1, the rear structure 2, and the connecting structure. In FIG. 4, a T-shaped member 13 is attached to the lower flange 12 of the traveling beam 1.
Attach.

[0003]

The above-mentioned method (1) has a problem that the construction period and cost are increased because all the running girders are renewed. (2) has a problem that a large strength improving effect cannot be expected because the reinforcing material is a cover plate. In (3), a greater strength-improving effect can be expected than in (1), but it is necessary to install a special jig for mounting work, and as shown in FIG. When the T-shaped member 13 is attached to the workpiece, the upward welding is performed, so that the construction period may be longer from the quality check of the on-site welding, and more skilled technicians of welding are required. is there.
Further, if upward welding is to be avoided, it is necessary to temporarily remove the traveling girder.

[0004] The present invention solves the above-mentioned problems of the conventional method of reinforcing the traveling girder of the overhead traveling crane and the reinforcement traveling girder, minimizes the range of reinforcement and remodeling without removing the existing traveling girder, shortens the construction period, An object of the present invention is to provide a method of reinforcing a traveling girder of a traveling crane of an overhead traveling crane which has a low construction cost, enables labor saving, and has high construction reliability.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the object of the invention described above, and has a traveling beam having a traveling crane rail laid on the upper surface of an upper flange portion;
A rail of an existing traveling girder comprising a rear structure facing the traveling beam along the traveling direction and a connecting structure connecting the traveling beam and the rear structure is removed, and the existing traveling girder having the rail removed is removed. An inner H-shaped reinforcing member to be in contact with an upper flange portion of the traveling beam, an outer H-shaped reinforcing member to be in contact with an upper portion of the rear structure, the inner H-shaped reinforcing member and the outer H-shaped member. It is constructed by a reinforcing method of a traveling girder of an overhead traveling crane, wherein a reinforcing member having a connecting member for connecting the mold reinforcing member and a structural member is fixedly provided. Here, the traveling girder and the rear frame are formed of, for example, H-shaped steel. The connecting structure may be formed as an inclined structure by angle steel, or may be connected by a steel plate at intervals in the longitudinal direction. Attachment of the reinforcing member to the traveling girder is preferably performed by previously assembling and integrating the inner H-shaped reinforcing member, the outer H-shaped reinforcing member, and the connecting member, which are constituent members, but the constituent members may be partially attached to the traveling girder. At the same time, the components can be integrated on the traveling girder. When a reinforcing member that has been assembled and integrated in advance is attached to the traveling girder, a rail, a safety deck, and a handrail are attached to the reinforcing member to further shorten the construction period. The H-shaped reinforcement includes a deformed H-shaped one such as an unequal-length flange. The inner H-shaped reinforcing member and the outer H-shaped reinforcing member can be formed in a ladder shape by being connected by a connecting member. Further, the inner H-shaped reinforcing member and the outer H-shaped reinforcing member may be formed in a ladder shape from H-shaped steel to CT-shaped steel. In addition, the traveling beam with the rail laid on the upper surface of the upper flange portion refers to the case where the rail is directly attached to the upper surface of the upper flange itself of the traveling beam by welding or the like, or indirectly via a mounting bracket (fastening bracket). This includes the case where it is attached to the upper flange.

According to the present invention, there is provided a traveling beam having a traveling crane rail laid on the upper surface of an upper flange portion, a rear structure opposed to the traveling beam along the traveling direction, and connecting the traveling beam and the rear structure. Remove the rail of the existing traveling girder consisting of the connecting structure to be connected, and on the existing traveling girder from which the rail has been removed, an inner H-shaped reinforcing member abutting on the upper flange portion of the traveling beam, and Reinforcement of an overhead traveling crane, wherein a reinforcing member comprising an outer H-shaped reinforcing member that abuts and a connecting member that connects the inner H-shaped reinforcing member and the outer H-shaped reinforcing member is fixed. It consists of a running girder.

[0007]

According to the present invention, there is provided a traveling beam having a traveling crane rail laid on the upper surface of an upper flange portion, a rear structure opposed to the traveling beam along the traveling direction, and connecting the traveling beam and the rear structure. Remove the rail of the existing traveling girder consisting of the connecting structure,
On the existing traveling girder from which the rail has been removed, an inner H-shaped reinforcing member to be in contact with the upper flange portion of the traveling beam, an outer H-shaped reinforcing member to be in contact with the upper part of the rear structure, Inside H
Since a reinforcing member including a mold reinforcing member and a connecting member for connecting the outer H-shaped reinforcing member to each other is fixedly provided, what is intended is to simply abut the reinforcing material only on the existing traveling beam to achieve reinforcement. Differently, the inside H-shaped reinforcement of the reinforcing member is brought into contact with the traveling beam of the traveling girder, the outer H-shaped reinforcement of the reinforcing member is brought into contact with the rear structure of the traveling girder, and the reinforcing member is added to the entire existing traveling girder. The traveling girder and the reinforcing member are integrated with each other to enhance the strength capability of the existing traveling girder.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a reinforcing traveling girder of the overhead traveling crane of the present invention. In FIG. 1, an existing traveling girder is located at a position opposite to a traveling beam 1 having a rail 5 of a traveling crane (not shown) arranged on an upper surface of an upper flange portion 4 along the traveling direction. And a connecting structure 3 connecting the traveling beam 1 and the rear structure 2. The rail 5 of the existing traveling girder is removed, the inner traveling H-shaped reinforcing member 6 to be brought into contact with the upper flange portion 4 of the traveling beam 1 on the existing traveling girder from which the rail 5 is removed, and the rear structure 2 H-shaped reinforcing member 7 to be brought into contact with the upper part of the
And a connecting member 8 for connecting the outer H-shaped reinforcing member 7 to the outer H-shaped reinforcing member 7.
In this example, the rail 5, the safety deck 10, and the handrail 11 were previously attached to the reinforcing member in the ground work. FIG. 2 is a perspective view of the reinforcing member to which the rail 5, the safety deck 10, and the handrail 11 are attached in advance in the ground work.

[0009]

According to the present invention, since the reinforcing member is placed and mounted on the existing traveling girder, the entire existing traveling girder and the reinforcing member are structurally integrated, and the construction is facilitated, the construction period is shortened, and the like. Low cost and labor saving can be achieved. In addition, the downtime of factory production can be shortened, which greatly contributes to maintaining productivity. If the reinforcing member is assembled and manufactured in a factory in advance, these effects can be further increased.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an embodiment of a reinforced traveling girder reinforced according to the present invention.

FIG. 2 is a perspective view of a reinforcing member according to the present invention.

FIG. 3 is a view showing an attached state of an existing traveling girder (marked with A).

FIG. 4 is an enlarged view of a portion indicated by A in FIG. 3, showing a state in which a T-shaped member is attached to a lower flange of a traveling beam.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Running beam 2 Back structure 3 Connecting structure 4 Upper flange part 5 Rail 6 Inner H-shaped reinforcing member 7 Outer H-shaped reinforcing member 8 Connecting member 9 Reinforcing member 10 Safety deck 11 Handrail 12 Lower flange 13 T-shaped member 14 Column

Continuation of the front page (56) References JP-A-57-89002 (JP, A) JP-A-52-116557 (JP, A) JP-A-2-106595 (JP, A) (58) Fields investigated (Int) .Cl. ⁷ , DB name) B66C 7/08

Claims (2)

(57) [Claims] 1. A traveling beam having a traveling crane rail laid on an upper surface of an upper flange portion, a rear structure located opposite to the traveling beam along a traveling direction, and a link connecting the traveling beam and the rear structure. Remove the rail of the existing traveling girder comprising the structure, on the existing traveling girder from which the rail has been removed, on the inner H-shaped reinforcement to be in contact with the upper flange of the traveling beam, and on the upper part of the rear structure. An overhead traveling crane comprising: a reinforcing member having an outer H-shaped reinforcing member to be brought into contact with a connecting member connecting the inner H-shaped reinforcing member and the outer H-shaped reinforcing member. Running girder reinforcement method. 2. A traveling beam having a traveling crane rail laid on the upper surface of an upper flange portion, a rear structure located opposite to the traveling beam along the traveling direction, and a link connecting the traveling beam and the rear structure. Remove the rail of the existing traveling girder comprising the structure, and, on the existing traveling girder from which the rail has been removed, contact the inner H-shaped reinforcing member that abuts on the upper flange portion of the traveling beam and the upper part of the rear structure. A reinforcing traveling girder for an overhead traveling crane, wherein a reinforcing member comprising an outer H-shaped reinforcing member and a connecting member for connecting the inner H-shaped reinforcing member and the outer H-shaped reinforcing member is fixed. .